Blar i USN Open Archive på emneord "Castor fiber"
Viser treff 1-19 av 19
-
Deadwood in beaver (Castor fiber) habitat – a study with focus on polypore fungi and saproxylic insects
(Master thesis, 2020)Deadwood is known as a diversity indicator in a forest, where 20-25 % of all forest species in the Nordic countries are dependent on deadwood. 10.7 % of the saproxylic beetles in Europe and 37 % of the polypore fungi in ... -
Echinococcus multilocularis Detection in Live Eurasian Beavers (Castor fiber) Using a Combination of Laparoscopy and Abdominal Ultrasound under Field Conditions
(Journal article; Peer reviewed, 2015-07-15)Echinococcus multilocularis is an important pathogenic zoonotic parasite of health concern, though absent in the United Kingdom. Eurasian beavers (Castor fiber) may act as a rare intermediate host, and so unscreened wild ... -
Efficacy of cartridge type and projectile design in the harvest of beaver
(Journal article; Peer reviewed, 2006)In Norway, Sweden, and Finland most beavers (Castor spp.) harvested are shot with center-fire rifles. Shooting entails problems not encountered in trapping including pelt damage from bullet holes (body shots are common) ... -
Extra pair copulation in the Eurasian beaver (Castor fiber)?
(Master thesis, 2016)In mammalian species, primarily in rodents, primates and canids, social monogamy is found in only 3-5% species and genetic monogamy appears to be rare. There is compelling evidence that the beavers (genus Castor) are a ... -
GPS-aided mapping of Eurasian beaver (Castor fiber) territories in southern Norway
(Master thesis, 2014)In this study I use GPS technology for the first time on the monogamous semi-aquatic Eurasian Beaver (Castor fiber). I tested the hypothesis that GPS technology can be used in the riparian environment. Further I tested the ... -
Invasive North American beaver Castor canadensis in Eurasia: a review of potential consequences and a strategy for eradication
(Journal article; Peer reviewed, 2012-12)Seven North American beavers Castor canadensis (Cc) were introduced into Finland in 1937 to supplement an ongoing reintroduction of the nearly extinct Eurasian beaver C. fiber (Cf). At that time, many zoologists recognised ... -
Mapping of sexual and seasonal differences in Eurasian beaver (Castor fiber) behaviour using GPS in southern Norway.
(Master thesis, 2016-01-19)In mammals monogamy is often characterized in mammals by reduced sexual dimorphism. Beavers, being a monogamous species are hard to observe, due to their nocturnal and semiaquatic nature. In this study I used GPS technology ... -
Methods of aquatic and terrestrial netting to capture Eurasian beavers
(Journal article; Peer reviewed, 2001)Effective live-trapping of beavers (Castor spp.) has been and will continue to be necessary for introductions, re-introductions, translocation, or to obtain animals for breeding and zoological gardens. Here we describe a ... -
Observing animal behaviour and movement patterns remotely: A case study using bio-logging technology on free-ranging Eurasian beavers (Castor fiber)
(Doctoral dissertations at the University College of Southeast Norway;10, Doctoral thesis, 2017-02-24)Understanding animal behaviour is a fundamental part of biology and has been revolutionized by the invention of bio-logging units, which can be used to study wild animals in their natural habitats. In this thesis, tri-axial ... -
Pair movement of a monogamous mammal, the Eurasian beaver
(Master thesis, 2019)Studying the cohesion of monogamous pairs is an important component in understanding their social relationships. I used the Eurasian beaver (Castor fiber) to investigate how movement patterns and space use relate to their ... -
Review of microsatellites in ecology and parentage analysis of Norwegian beavers (Castor fiber) based on cross-specific microsatellites
(Master thesis, 2009)The Eurasian Beaver (Castor fiber) in Scandinavia was once close to extinction due to a bottleneck resulting from vigorous overhunting in the middle of the 19th century. After measures of protection, the population number ... -
Selection of aquatic vegetation in river habitats by Eurasian beaver (Castor fiber) in South-Eastern Norway
(Master thesis, 2020)Habitat selection in animals is evident when the choosing of habitat is disproportionate to its availability, usually when habitat characteristics differ in quantity and quality. A very important factor of their use is the ... -
Sex and age composition of spring-hunted Eurasian beaver in Norway
(Journal article; Peer reviewed, 2002)In Norway, Sweden and Finland most Eurasian beaver (Castor fiber) harvested are shot in April and May. As beaver cannot be sexed or effectively aged under spring hunting conditions, hunters normally shoot the first animal ... -
Sex discrimination via anal gland secretion in a territorial monogamous mammal
(Journal article; Peer reviewed, 2014-07-12)Monogamy in mammals is relatively unusual, only occurring in 3-5% and to an even lesser degree in rodents. Monogamy exists in two forms, facultative which evolved due to female dispersion and obligate when male care is ... -
Short-term effects of bio-logging on body mass and growth of a semi-aquatic mammal, the Eurasian beaver (Castor fiber)
(Master thesis, 2020)Bio-logging is a popular method to collect scientific data in the field of animal ecology. The presumption is that bio-logging should allow the study of animals with only minor disturbance to their natural behaviour and ... -
Socio-ecological features other than sex affect habitat selection in the socially obligate monogamous Eurasian beaver
(Journal article; Peer reviewed, 2015-08-11)Habitat selection is a context-dependent mechanism, in which both the internal state as well as external factors affect the behavior and decisions of an individual. This is well known for polygamous mammals, which are ... -
Territoriality and life history strategies of the Eurasian beaver
(Doctoral dissertations at the University College of Southeast Norway;24, Doctoral thesis, 2017-09-29)We studied life history strategies in the Eurasian beaver (Castor fiber), a territorial, monogamous, long-lived mammal, to increase our understanding of the mechanisms and trade-offs affecting the onset of natal dispersal, ... -
The importance of vegetation availability in three scales on body condition, reproduction and territory size of the Eurasian beaver
(Master thesis, 2019)Availability of food resources can affect body condition and reproduction in animal populations as low food availability can lead to decreasing body condition and constrain reproduction. At the same time, spatial distribution ... -
Ørret (Salmo trutta) viser antipredatoradferd på avføring fra mink (Mustela vison) fôret på artsfrender
(Master thesis, 2011)Innførte predatorer, deriblant pattedyr, kan teoretisk utgjøre risiko for byttedyrpopulasjoner av lokale arter dersom byttedyret ikke har utviklet relevant antipredatoradferd. I hvilken grad dette er økologisk relevant ...